It forms in rivers, oceans, glaciers, and desert deposits.
Sandstone forms when pressure and raised temperatures allow sand grains and other materials to fuse together by mineral infused liquids.
Sandstone contains quartz, feldspars, micas, calcite, and clays.
Sandstone is typically fine grained, but can be medium.
Sandstone can be both, rounded and angular.
Sandstone is a uniform rock.
Sandstone can contain fossils of seashells.
Sandstone can be used for building material, decorative stones, tiles, tombstones, monuments, roads, ore of silica for glass, abrasives, aquifers, and petroleum reservoirs.
-Sources
http://www.backyardnature.net/g/rox-sed.htm
http://en.wikipedia.org/wiki/Sedimentary_rock#Sandstones
http://www.galleries.com/rocks/sandstone.htm
http://www.mineralszone.com/stones/sandstone.html
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